Wrench



Aug. 17 1926.

W. C. KISNER WRENCH I Filed May 1925 I EL m m m MW m N 7 If u fi W 3Patented Aug. 17, 1926.

1,595, 64 W Witter...

WILLIA c! Kremlin, a was wast viaemm wnE cH.

Application filed Ma a,

This invention relates broadly to wrenches, and more specifically to awrench of ratchet type. i

The primary object of the invention is to provide a wrench having arelatively ad justahle j aw structure and having one of itsjawsshiftable away from the opposite jaw under the forcewhich' isexerted thereon in returning'the wrench, to an initial position forobtaining a new hold. j A further. object is, to provide a simple andpractical wrench which functions inthe manner of 'ordinary forms ofratchet wrenches and which, 'atthe same time,'i s adjustable toaccommodate itself to nuts of different sizes. In describingtheinvention in detaihreferonce is herein had to the accompanying drawings,in which "Figure 1 is a side elevation of a wrench constr .cted inaccordance with my inven tion; the same being shown in rotatingrelation' to a nut; i

Figure 2 is a similar view showing the wrench being reversed over'thenut to obtain a new hold; and

Figure 3 is a section taken on line 33, Fig. 2.

Referring to said drawings, 1 indicates the wrench head which ispivotally mounted upon a tongue 2 of reduced thickness formed on thefront end portion of a. wrench handle 3, said head having in its rearend a recess or transverse slot at within which said tongue 2 isreceived. Said wrench head 1, which is of materially greater width atits front end than at its rear, or pivoted, end, has extendingtherethrough adjacent to its said front end a transverse bore or way 5which opens outward through the face of said front end in the form of arelatively narrow slot 6.

The bore 5 constitutes a guideway in one end of which is disposed fortransverse sliding movement a rack-bar 7 formed upon a movable jaw 8,the teeth of said rack-bar being engaged with a worm 9 which is locatedwithin and has opposite portions of its periphery protruding fromopposite sides of an opening 10 in said head 1. Said worm is mounted forrotation upon a pin 11 which crosses said opening 10, as shown.

A notched member 12 carried by a second jaw 18 is) disposed for slidingmovement in the opposite end of the guideway 5, said jaw 13 beinglocated in opposed relation to the adjustable jaw 8. A flat resilientsteel spring substantially 1925; Serial no. 28,807.

1 1- is disposedwith its free end against'the its outer end pivotallymounted in a recess or channel-17"*prov ded therefor in an arm 18 whichis fixed ta'or formed integral with,

the wrench handle 3 andwhich forms a fixed or m'oveme'nt-limiting"abutment against which the ad acent edge portion of thehead 1- andthespring 14: normally rests, as shown in F 1. fSaid head is normallyheldin seated relationto said armorsbutment by neansof aflat resilientsteelspring 19 which is attached to the handle '3 and has its free endportion seated againstthe edge portion of said head opposite thatwhich'bears the spring 14. V

The dog is longitudinally movable into and out ef engageinent with' 'thenotch 16 through holes 20, and '21 provided therefor in the spring 14:and the head 1, said hole 21 extending at substantially a right angle tothe bore 5.

In practice, by rotation of the worm 9, the jaw 8 is adjusted toposition it at the proper distance from the normally stationary jaw 13for grasping the part, as the nut 22, to be rotated, as shown in Fig.'1. The wrench is then rotated forward in the direction indicated by thearrow in said ure. In such forward rotation the jaw 13 is maintainedagainst movement in an outward direction both, by the pin 15 engaged.with the notch 16 and by the arm 18 which is then abutted by a portionof said jaw.

Following the advance rotation described, or when the wrench is to bereturned to obtain a new hold on the nut, the return movement may beeffected without disengaging the wrench from the nut, or in the mannerof a ratchet wrench. When the wrench handle 3 is so returned in thedirection indi cated by the arrow in Fig. 2, the force exerted to effectrearward movement of the jaws with respect to the stationary nut 22 actsto produce relative movement between the said handle and the head 1, theformer turning on the connecting pivot pin 28 against the pressureexerted by the spring 19, so that the said parts occupy approximatelythe relative positions shown in said figure. Additionally,- as the arm18 is withdrawn from Said aw, so released, is then capable of-out' wardmovement against the slight pressure exerted by the spring 14 to theextent that it may abut the arm 18 in the then withmovement of the jaw13 is induced as the i latter passes over theangular edges of the thenstationary nut in the-rearward rotarymovement of the wrench, as shown 1nF g. 2. The spring 14 acts to'return said jaw to its normal positionfollowing the passageof the latter'over said angular edges. 'When thewrench comes to rest following the rear ward movement thereof, the partsresume their normal positions shown in Fig. 1,

lVhat is claimed'is e; Q 1. A wrench comprising a handle, a headattached pivotally to said handle to permit relative lateral movement,an arm carried by said handle in a position-to limit the extent of saidmovement in one direction, resilient a means normally holding said headin abutting relation to said arm, ajawmounted on saidhead andshiftablevtransverselyjof the latter, a dog for normally holding saidjaw stationary, said dog being movable into and movements of said headaway from and toward said arm, a second jaw carried by said head'inopposing relation to the first mentioned jaw, a rack-bar formed integralwith said second jaw, said head having a transverse guideway in whichsaid rack bar is "sli dable and an adjusting worm engaged M I with saidrack-bar. drawn position of the latter. The outward 2. A wrenchcomprising a handle, a head attached pivotally to said handle to permitrelative lateral movement, anarm carried by said handle in a position tolimit the extent of said movement in one direction, resilient meansnormally holding saidihead in abutting relation tosaid arm, a jawmounted on said head and shiftable transversely of the latter, a dogfornormaily holding said jaw stationary, said dogbeing pivotally mountedon said arm and said head having therein anopenmgthrough which said dogis movmounted on said head, and-means for adjusting said second'jawrelative to the first ment oned aw.

v Intestimony whereof, I affix my signav ture, t Y Y i out of operativerelationto said jawtwith 'wILLiAM o. KISNER.

6'0 able into and out of holding relation to said a "13W w th movementsof said head away from and toward said arm, a; spring normally

